The acoustic limit in the null‐field approach to elastodynamic scattering
作者:
Peter Olsson,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1986)
卷期:
Volume 80,
issue 1
页码: 317-324
ISSN:0001-4966
年代: 1986
DOI:10.1121/1.394149
出版商: Acoustical Society of America
关键词: NULL FIELD METHOD;SCATTERING;ELASTIC WAVES;BOUNDARY CONDITIONS;P WAVES;S WAVES
数据来源: AIP
摘要:
The limit of a vanishing shear modulus in the null‐field approach to elastodynamic scattering by bounded scatterers is investigated. It is demonstrated, for a fairly large class of surfaces and for several types of boundary conditions, that the coupling between the incident and scatteredPwaves tends to that of a corresponding acoustic scattering problem. However, by explicit examples it is also demonstrated that theP–Scoupling does not in general tend to zero rapidly enough for the amplitude of the scatteredSwave to vanish pointwise in this limit; there remains a nonzero amplitude of a wave whose wavelength goes to zero.
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